Which of the following statements regarding phagocytes and phagocytosis is true?
A) Macrophages, monocytes, and mast cells are phagocytes.
B) Contact of phagocytes with microbes stimulates the phagocytes to release chemicals that mediate the inflammatory response.
C) Phagocytosis is stimulated by the presence of proteins called rhodopsins.
D) Phagocytosis is the process by which leukocytes exit the bloodstream.
E) Phagocytosis is a process that only occurs within the bloodstream.

Question

Quizplus · Accepted Answer

Contact of phagocytes with microbes stimulates the phagocytes to release chemicals that mediate the inflammatory response. This statement is true. A is incorrect because mast cells are not phagocytes; they release histamine to initiate inflammatory responses. C is incorrect because rhodopsins are photosensitive proteins in the retina of the eye and have nothing to do with phagocytosis. D is incorrect because leukocytes exit the bloodstream via a process called diapedesis, not phagocytosis. E is incorrect because phagocytosis can occur in tissues outside of the bloodstream, such as in the lungs and in body cavities.

Which of the Following Statements Regarding Phagocytes and Phagocytosis Is